Ethynyl (C 2 H) in Massive Star formation: Tracing the Initial Conditions?
نویسندگان
چکیده
منابع مشابه
Ethynyl (c2h) in Massive Star Formation: Tracing the Initial Conditions?
APEX single-dish observations at sub-millimeter wavelengths toward a sample of massive star-forming regions reveal that C2H is almost omni-present toward all covered evolutionary stages from Infrared Dark Clouds via High-Mass Protostellar Objects to Ultracompact Hii regions. High-resolution data from the Submillimeter Array toward one hot-core like High-Mass Protostellar Object show a shell-lik...
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As Pr. Th. Henning said at the conference, cold precursors of high-mass stars are now “hot topics”. We here propose some observational criteria to identify massive infrared-quiet dense cores which can host the highmass analogs of Class 0 protostars and pre-stellar condensations. We also show how far-infrared to millimeter imaging surveys of entire complexes forming OB stars are starting to unve...
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We summarize the properties of Infrared Dark Clouds, massive, dense, and cool aggregations of interstellar gas and dust that are found througout the Galaxy in projection against the strong mid-infrared background. We describe their distribution and give an overview of their physical properties and chemistry. These objects appear to be the progenitors of highmass stars and star cluster, but appe...
متن کاملProbing the initial conditions of high-mass star formation
Most work on high-mass star formation has focused on observations of young massive stars in protoclusters. Very little is known about the preceding stage. Here, we present a new high-resolution study of pre-protocluster regions in tracers exclusively probing the coldest and dense gas (NH2D). The two target regions G29.96−0.02 and G35.20−1.74 (W48) are drawn from the SCAMPS project, which search...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2008
ISSN: 0004-637X,1538-4357
DOI: 10.1086/533412